Turbine blading



c. GILSON TURBINE BLADING Filed April 18, 192? C. Giilson v INVENTOR BY 5% WITNESSE ATTORNEY Fatented Get. 9, 1923.

warren stares 1,469,901 ear-"sat m c CHRISTIAN GILSON, OF PITTSBURGH, PENNSYLV'JENTA, ASSIGNOB TO WESTINGHOUSE ELECTRIC AND IJIANUFACTUEING COMPANY, I; CORPORATION OF BENN YLVANIA.

TURBINE BLADING.

Application filed April 18, 1922. Serial No. 554,988.

To all 1072 0172. it may concern:

Be it known that I, CHRISTIAN GInsoN, citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and. useful Improvement in Turbine Blading, of which the following is a specifi cation.

My invention relates to turbine blading of the wide type and it has for its object to provide apparatus of this character which is made in sections in order to facilitate manu-' facture and economy of construction.

These and other objects, which will be made apparent throughout the further description of my invention, are obtained by means of apparatus embodying the features herein described and illustrated in the drawings, accompanying and forming a part hereof, in which Fig. 1 is a longitudinal sectional view of a turbine showing my imabstracting elements,

proved form of blading applied thereto; Fig. 2 is a sectional view taken along the line II.-II of Fig. 1; Fig. 3 is .a detail view, upon an enlarged scale, of one of the wide blade sections; Fig. 4 is a detail view showing modified guide members; and Fig. 5 is a detail view showing a preferred mode of fastening the blades to the rotor.

In the application of Alexander T. Kasley, Serial No. 486,517, filed July-.21, 1921 and assigned to the Westinghouse Electric & Manufacturing Company, there is :dis-

closed and claimed an elastic-fluid turbine v c'on'uprising a blade may be assembled before provided with a last row of relatively wide blades which are adapted to receive elasticfluid or steam at one side and to discharge the same at the tips or peripherally. These blades have substantially flat inner portions and outer curved or spoon-outline portions arranged to discharge the steam or elasticfluid. peripherally at small angles.

It is the object of my present invention to provide blading of the character referred to which is made in sections-in order to facilitate manufacture of the blades as well as the assembly of .the blade structure.

Referring now to the drawings for a more detailed explanation of my invention, I show a turbine comprising a rotor 10 and a casing or cylinder 11, with suitable energyincluding my improved low-pressure stage 12, carried there by.

The ion pressure stage 12 comprises a stationary row of guide blades 18, carried by the cylinder or casing 11, and adapted to discharge steam betweenthe sides of the wide blades 14, carried, by the rotor;, and,

,from the latter blades, the steam is discharged radially or peripherally to the ex haust chamber 15. p

The wide blades 14 have substantially radial inner portions 16 and curved or spoonoutline outer portions 17. The radial portions 16 are provided with roots 18 of any suitable shape, for example, of the dOHb'ldovetail type, to fit correspondingly shaped longitudinal grooves 19 in the rotor. The.

blades are provided with curved angle-iron we guide or deflector members 20 which serve to deflect the steam from an axial toward ti one 21 of a single blademay be much more easily drop-forgedthan a one-piece blade.

Another advantage peculiar to the sectionalized type of blading, is the possibility of weldin or brazin the abuttin uide rib or deflecting members 20in order to more securely brace the. blading structure. y

My improved;sectionalized blading may be assembled by placing successive annuli of sections 21 onthe rotor orallof the sections the assembly of another bladefis started. After the blading is' assembled, the angle iron deflector members 29 may be welded, soldered, or brazed to the assembled blades;

or,.if the deflector members are madein secfiector members are soldered, welded, or

brazed together. Where the blading is assembled in one annulus of sections at a time, and sectionalized deflector members are used, both theconnection of the deflector sections to the blade sections as well as to each other may be more readily effected.

In Fig. 4,1 show airlodified form of guide or deflector structure'which comprises guide or-deflector plates 24 suitably shaped and curved to fit in curved grooves 25 carried by theblade sections 21. Deflector members of this type may be made as single pieces and positioned after the blading is assembled, or they may be made in sections as mentioned above in connection with the deflector members 20.

From the foregoing, it will be apparent that I have provided Wide blading made in sections so that it may be easily drop-torged and may be assembled to present a strong blade structure. p I v VVh1le I have shown my invention in but two forms, it will be obvious to those skilled elastic fluid at one side and to discharge it atthe tips, each of said Wide blades being made up of a plurality o'f sections,

2. In an elastic-fluid turbine, a row of relatively 'WZlClG blades adapted to receive elastic fluid at one side and to diseha 'ge it at the tips, eachot said ivide blades being made up of a-ipli-irality of SQCillODS, Whose sides are, substantially normal. to the axis of rotation. f I

3.7111 an elastic-fluid turbine, a row of relatively Wide blades adapted to receive elastic fluid at one side and to dischargeit at the tips, each of said Wide blades being made up of a. plurality oi? sections, and means for securing corresp-ondiug sections of the blades together.

{L In an elastic-fluic i'l'll blflt), a row ot relatively Wide blades adapted to receive elastic fluid laterally and to discharge ll'/ peripherally, each ,ot said Wide bladesbeing made insections and each section including a root and tip portion. I

5. In an elastic-fluid turbine, row of relativelyjwide blades adapted to receive elastic fluid laterallyand to discharge it peripherally, each of said Wide blades being made in sections, and curved ribs carried by the blades and cooperating to reinforce the blades andto define guiding walls tor the elastic fluid to gradually change its direction of flowfor peripheral discharge.

6. In. an elastie-flui turbine a row of Wideblades adapted toireceive elastic fluid laterally and to discharge it peripherally, said blades havinginner portions arranged substantially radially and outer curved tions,'the latter serving to discharge elastic fluid at a small tangential angle, each ot sa d blades comprising flblllliililfi' sections 7; In an elastic-fluid turbine, a row of wide blades adapted to receive elastic fluid laterally and to discharge it peripherally, said l; ladeshaving inner portions arranged in substantially radial planes and outer curved portions, the latter serving to discharge elastic fluid at a small tangential angle, each of said blades comprising abutting sections, and means for securing corre sponding sections of adjacent blades together and for guiding the elastic fluid.

8. loivpressure IOW of moving blades for an elastic-fluid turbine adapted to receive elastic fluid laterally and to dischar c it at the tips, each of said blades compi ing abutting sections, guide or deflector members secured to the sections and serving;

to reinforce them, and. cooperating, when the blading is' assembled, to define curved guide Walls to gradually change the ClllQC,

tion of flow of the elastic fluid for discharge at the blade tips. i

9. In an elastic-fluid turbine, a row, of sectional blades in. which the direction of flow of elastic fluid is changed and guide means arranged between the blades for eitfecting the gradual change in direction of lion of the elastic fluid.

10. In an elastic-fluid turbine, a row ot sectional blades between Which the direction of flow of elastic fluid is changed and guide means 'mace in sections corresponding' to the blade sections for eiiecting the change in direction of'flow of the elastic fluid.

11. In an elastic-fluid turbine, a IOW'OI blades, each of Which is composed of a plurality of abutting sections Whose sides are transverse tothe axis of rotation, and means for l'iracing corresponding sections of the blades. 2

, l2, In an elastic-fluid turbine,a row of blades, each of which is composed of a plurality of abutting sections Whose sides are transverse to the axis of rotation, and means for bracing corresponding sections of the blades and for controlling the direction of flow of elastic fluid between the'blades.

13. In an elastic-fluid turbine, a row oi blades each of which is composed of a plusrality of abutting sections Whose sides are transverse to the axis of rotation of the turbine, angle sections having portions Welded to sections of the blades and abutting subscribed my name this 13th day otApril,

(JHRISTIAN GILSONJ I portions welded together to firmly support 

